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      1 // Variable Templates For chrono -*- C++ -*-
      2 
      3 // Copyright (C) 2014-2024 Free Software Foundation, Inc.
      4 //
      5 // This file is part of the GNU ISO C++ Library.  This library is free
      6 // software; you can redistribute it and/or modify it under the
      7 // terms of the GNU General Public License as published by the
      8 // Free Software Foundation; either version 3, or (at your option)
      9 // any later version.
     10 
     11 // This library is distributed in the hope that it will be useful,
     12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 // GNU General Public License for more details.
     15 
     16 // Under Section 7 of GPL version 3, you are granted additional
     17 // permissions described in the GCC Runtime Library Exception, version
     18 // 3.1, as published by the Free Software Foundation.
     19 
     20 // You should have received a copy of the GNU General Public License and
     21 // a copy of the GCC Runtime Library Exception along with this program;
     22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     23 // <http://www.gnu.org/licenses/>.
     24 
     25 /** @file experimental/chrono
     26  *  This is a TS C++ Library header.
     27  *  @ingroup libfund-ts
     28  */
     29 
     30 //
     31 // N3932 Variable Templates For Type Traits (Revision 1)
     32 //
     33 
     34 #ifndef _GLIBCXX_EXPERIMENTAL_CHRONO
     35 #define _GLIBCXX_EXPERIMENTAL_CHRONO 1
     36 
     37 #pragma GCC system_header
     38 
     39 #include <bits/requires_hosted.h> // experimental is currently omitted
     40 
     41 #if __cplusplus >= 201402L
     42 
     43 #include <bits/chrono.h> // Only the C++14 parts of <chrono>
     44 #include <experimental/bits/lfts_config.h>
     45 
     46 namespace std _GLIBCXX_VISIBILITY(default)
     47 {
     48 _GLIBCXX_BEGIN_NAMESPACE_VERSION
     49 
     50 namespace chrono {
     51 namespace experimental
     52 {
     53 inline namespace fundamentals_v1
     54 {
     55 // See C++14 20.12.4, customization traits
     56 template <typename _Rep>
     57    constexpr bool treat_as_floating_point_v =
     58      treat_as_floating_point<_Rep>::value;
     59 } // namespace fundamentals_v1
     60 } // namespace experimental
     61 } // namespace chrono
     62 _GLIBCXX_END_NAMESPACE_VERSION
     63 } // namespace std
     64 
     65 #endif // __cplusplus <= 201103L
     66 
     67 #endif // _GLIBCXX_EXPERIMENTAL_CHRONO
     68